Daan Reijnders
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daanreij.bsky.social
Daan Reijnders
@daanreij.bsky.social
Oceanography & MRV @ SeaO2 🌊
Previously PhD @ Utrecht University
Climate, mCDR & Lagrangian stuff
Views my own.
Reposted by Daan Reijnders
According to this plot and associated thread, satellites already in orbit, providing invaluable views of our ocean and earth will be turned off. Future missions almost uniformly cancelled. It’s almost too destructively insane to believe true. 🌊
I suspect someone may have already done this... I took the current NASA Earth fleet chart of operating and planned Earth observing missions and crossed out those recommended for cancellation in the President's budget request. It's disturbing.
June 3, 2025 at 11:21 AM
Alright, seems like that NOAA thing was very very poor timing, so taking down my worried post - BUT still worried about NOAA’s fate with the doge hounds around.
I just spoke with NOAA public affairs person who confirms that the GML site is down to "scheduled 5-year maintenance of the electrical switchgear" at lab site in Boulder, and will be back online by 6pm MST today.
www.boulder.noaa.gov/public-affai...
February 5, 2025 at 11:27 PM
Reposted by Daan Reijnders
Important statement by the American Association of University Professors warning against "anticipatory obedience".
www.aaup.org/report/again...
Against Anticipatory Obedience
The statement that follows, prepared by a joint subcommittee of the Association’s Committee on College and University Governance and Committee A on Academic Freedom and Tenure, was approved for public...
www.aaup.org
February 4, 2025 at 7:13 AM
Reposted by Daan Reijnders
Self-proclaimed defenders of free speech are busy suppressing information that they consider to be at odds with their ideology of concentrating power and wealth among the few. Censorship, propaganda and disinformation are the tools to keep the public docile.
www.theguardian.com/us-news/2025...
Doge staffers enter Noaa headquarters and incite reports of cuts and threats
Members reportedly sought access to IT systems at agency that Project 2025 has called ‘harmful to US prosperity’
www.theguardian.com
February 5, 2025 at 9:17 AM
Reposted by Daan Reijnders
We can also look at global daily absolute temperatures (rather than anomalies), which show just how much global temperatures have shifted over time:
January 10, 2025 at 7:01 PM
The Sustainable Ocean Community (@utrechtuniversity.bsky.social & @niozsearesearch.bsky.social) is organizing the second installment of their #mCDR symposium series, this time on the science-industry interface. 21 jan in Utrecht. Full program TBA.
www.uu.nl/en/events/sy...
Symposium on the science-industry interface of marine Carbon Dioxide Removal
On January 21st, a second symposium will be held on marine Carbon Dioxide Removal. This time, the focus will be on the science-industry interface.
www.uu.nl
December 18, 2024 at 9:13 AM
Reposted by Daan Reijnders
Ocean Acidification is reshaping life and biogeochemical cycles.
In our latest study, Niki Gruber and I reconstructed its progression in the global ocean interior over the industrial era, based on our previous estimates of anthropogenic carbon accumulation.
doi.org/10.1126/scia...

A 🧵about the 🌊...
Progression of ocean interior acidification over the industrial era
The rapid downward progression of anthropogenic carbon accelerates ocean interior acidification and threatens marine biota.
doi.org
November 28, 2024 at 9:22 AM
Reposted by Daan Reijnders
I really love this animation of the C cycle, and how we’re affecting it through burning fossil fuels, by @rarohde.bsky.social

I use it in my teaching every year!
youtu.be/dwVsD9CiokY
The Earth's Carbon Cycle
YouTube video by Robert Rohde
youtu.be
November 25, 2024 at 4:22 PM
Do you use Lagrangian (back)tracking? 🕙🔄 My last thesis chapter identifies how divergence can amplify numerical errors in Lagrangian tracking, and how especially for backtracking this can lead to substantial biases in source inference.

Find the pre-print here: essopenarchive.org/users/560859...
Stability Bias in Lagrangian Backtracking in Divergent Flows
Origins of material in the ocean are commonly identified by tracing Lagrangian particle trajectories backward-in-time in two or three dimensions. While this is mathematically consistent, numerical com...
essopenarchive.org
August 29, 2024 at 1:37 PM
Have to start using bsky and a paper alert is a classic 📝
Our paper (w/ Dorothee Bakker and Erik van Sebille) on carbon transformations in North Atlantic Subtropical Mode Water is out in JGRO. We disentangle DIC changes in Lagrangian parcels (1/2)
agupubs.onlinelibrary.wiley.com/doi/10.1029/...
Disentangling Carbon Concentration Changes Along Pathways of North Atlantic Subtropical Mode Water
Carbon transformations along pathways of North Atlantic Subtropical Mode Water are split into mixing and biogeochemical contributions Along paths into, within, and out of this mode water, mixing ...
agupubs.onlinelibrary.wiley.com
July 18, 2024 at 9:11 AM
I made it over!!! 😮‍💨 Time to rebuild my bubble
December 21, 2023 at 8:02 AM